Hoe wheel plate stamping



Aug. 27, 1946. e. E. KARL HOE WHEEL PLATE STAMPING Filed Dec. 4, 1944 2 Sheets-Sheet 1 IHT.

HUI

mu llll ll In INVENTOR.

' @ao 'ge E Z'arZ Aug. 27, 1940. v G. E. KARL 0 2,406,500

HOE WHEEL PLATE STAMPING Filed Dec. 4 1944 2 sheets-sheet 2 xmiimlmu.

' INVENTOR.

Patented Aug. 27, 1946 HOE WHEEL PLATE STAMPING George E. KarL'Liberty, Ind., assignor to General Implement Corporation, Cleveland, Ohio, a

corporation of Ohio Application December 4, 1944, Serial No. 566,428

This invention relates to farm implements of the rotary hoe type especially suitable for use in breaking up, loosening and cultivating the soil. Implements of this general type are usually made up of a plurality of toothed wheels, disposed in suitably spaced apart relationship to each other, depending on the particular use of the implement or the character of the soil in which it is to operate. More particularly, the present invention is directed to improvements in toothed wheels of rotary hoes in which the wheels are provided with removable and replaceable teeth of the doubie pronged type having an anchorage portion of generally U-shaped formation.

Wheels of rotary hoes a heretofore produced. include two plates or disc-like elements between which the pronged teeth are rigidly anchored, and these plates are formed as castings. As is Well known, castings possess the undesirable characteristic of being fragile, and may readily break under severe stress or strain when subjected to rugged usage. Rotary hoe wheels heretofore made with cast plates are relatively heavy and furthermore when the pro-nged teeth are mounted in place therebetween, great care must be exercised to avoid the possibility of imposing excessive strain in tightening the bolts so as to avoid possibility of fracture or breakage of either or both of the plates.

One of the objects of this invention is to provide an improved toothed wheel of a rotary hoe, characterized by the provision of a relatively light weight durable construction which permits effecting a substantial reduction in cost of manufacture.

Another object is to provide an improved toothed wheel of a rotary hoe wherein said wheel comprises a pair of stamped sheet metal plates, constructed and arranged to rigidly support therebetween a plurality of circumferentially spaced apart, outwardly projecting, double pronged teeth and providing a rugged and durable construction capable of withstanding severe usage.

With these and other objects in view my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in the claims and illustrated in the accompanying drawings, wherein:

Figure 1 is a plan view of the improved wheel of a rotary hoe, embodying the present invention.

Figure 2 is a transverse section through the 2 Claims. (01. 97-216) 2 wheel, taken-substantially as indi ated at i 2-2 on Figure 1.

Figure 3 is a fragmentary sectional view through the outer marginal portion of the wheel, taken substantially as indicated at line 3-3 on Figure 1.

Figure 4 is an inner face view of one of the plates of the wheel and showing one of the double pronged teeth seated in position on the plate.

In implements of the type embodying the present invention it is the usual practice to utilize a plurality of individual toothed wheels, mounted loosely in a desired spaced apart relation on a shaft, to constitute a single unit. For certain uses more than one unit consisting of a desired number of individual wheels may be employed,

and if desired the wheels of one unit may be dis-v posed in overlapping or offset relation to the wheels of an adjacent unit.

The wheel embodying the present invention, as represented in the drawings, includes two identical plates iii, of generally circular contour, adapted to be disposed in cooperating relation for embracing therebetween a plurality of circumferentially spaced apart, outwardly projecting double pronged teeth I l. The teeth each include a generally U-shaped anchorage portion Ha, adapted to be firmly and rigidly clamped in position between the plates when the latter are fixedly connected together by a plurality of circumferentially spaced apartbolts i2.

Each of said plates is formed as a unitary sheet metal stamping, and the inner face of each plate as clearly seen in Figure 4 of the drawings, is formed with a plurality of circumferentially spaced apart, outwardly opening, U-shaped grooves I4 which constitute mounting seats for the anchorage portions i la of the double pronged teeth H. The grooves I4, as may be clearly seen in Figure 2, are substantially V-shape in cross section and the grooves of the two'cooperating plates are adapted to be aligned with each other and form complementary seats for opposite sides of the anchorage portions Ila of the double pronged teeth. When the cross section of metal of the legs of the anchorage portion is of diamond shape, such as seen in Figure 2, the opposite corners of the legs are adapted to seat firmly and snugly in the grooves I 4. Said grooves are of such contour, however, as to readily accommodate teeth of various cross sectional forms, such as circular, oval, etc.

The plates are each formed with correspondingly positioned apertures l6, for accommodation of the bolts I2, and said apertures are preferably teeth ii interposed bolts I2. with respect to the two plates. 7

bled together with the k alignment, each set of projections function as teeth. 7

located within the areas encompassed by the 1 grooves It, as may be seen ing each of the apertures in Figure 4. Surroundl6, on the outer face of each plate, is an outwardly projecting boss l1,

heads or the nuts of the maximum convenience in appossibility of spring of the plates when they are 3 assembled and the bolts are tightened. When the two plates ID are assembled together, with the therebetween, the assembly' r j is then rigidly connected together by means'of the thus rigidly afiixed The teeth ii are It will be apparent that if it becomes necessary It will be apparent, that by virtue of the novel construction embodying the present invention, in addition to obtaining the advantages of quick and easy replacement of damaged or worn teeth, the wheel per se is of relatively light weight, low in manufacturing cost, and possesses the important advantage of increased strength and adaptability for rugged usage without readily becoming damaged.

Some changes may be made in the construction 7 and arrangement of the parts of my device withto replaceone or more of the teeth ofthe assembled wheel, it merely requires the removal of I the bolts [2 to separate the plates and'permit 1 such replacement.

Extending outwardly from the outer marginal 1 portion of each of the plates, area plurality of j circumferentially spaced apart, tapered projections l9, located in posed between each of a pair of adjacent legs When the plates are assemsuch relation so as to be disof the teeth ll.

projections disposed in stone eliminators to preclude wedging 0t stones or other objects between adjacent prongs of,the teeth which might result in deformation of the The marginal portion of each of the plates, intermediate adjacent projections I9, is formed with a laterally projecting flange portionw2l. As may be seen in Figure 1, these flange portions extend at opposite ends for a substantial portion of formation of the grooves I4, merges attheouter,

ends into the laterally projecting flanges 2|.

Each of the plates I8 is formed with a central aperture 24, surrounded by a laterally projecting annular flange 2-6. Press fitted into the aperture 24 of the annular flange 26, of each plate III, is a hub member 21, having a flange 28, seated tightly against the inner face of said 'plate. The flanges/28 of both hub members are of such thickness that when the plates H) are bolted together,- asabove described, the outer faces of the flanges 28 are disposed in abutting relation, as seen in Figure 2, and the two hub members thus serve as a bearing hub for mounting of the wheel on a shaft, as indicated indot and dash outline at A} inFigure 2 of the drawings. 1

V out departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope without sacrificing' any of the advantages thereof.

I claim 'as my invention:

1. In a rotary hoe of the type comprising one or more wheels each composed of a pair of cooperating plates and a plurality of circumferentially spaced apart, outwardly projecting, double pronged teeth each having a U-shaped anchorage portion clamped firmly between said plates, together with bolts for-securely connecting said plates together; the improvement which comprisesa pair of plates having aplurality of sets of circumferentially spaced apart, complementary U-shaped grooves to constitute seats for the anchorage portion of said teeth, said plates having a plurality of sets of aligned, outwardly extending projections, disposed intermediate the legs of each of said grooves, and the outer marginal edge of each plate, intermediate adjacent projections, terminating in laterally extending flanges.

2. In a rotary hoe of the type comprising one or more wheels each composed of a pair of cooperating plates and a plurality of circumferentially spaced apart, outwardly projecting, double pronged teeth each having a U-shaped anchorage portion clamped firmly between said plates,1

' prises a air of plates having a plurality of sets of circumferentially spaced apart, complementary U-shaped grooves to constitute seats for the anchorage portion of said teeth, said plates having a plurality of sets of aligned, outwardly extending projections, disposed intermediate the legs of each of said grooves, and the outer marginal edge of each plate, intermediate adjacent projections, terminating in laterally extending flanges, the end portions of which extend throughout a substantial portion of the of the sides of said projections.

GEORGE E. KARY 1 7 length 

